Many of our older Tecumsehs with carb mounted pump were switched to the cube style pump.Quote:
Originally Posted by jss16
Is your machine a 74 ABS hard body machine with a 2 stroke?
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Many of our older Tecumsehs with carb mounted pump were switched to the cube style pump.Quote:
Originally Posted by jss16
Is your machine a 74 ABS hard body machine with a 2 stroke?
https://im1.shutterfly.com/media/47a...D550/ry%3D400/
yes mine is 2 stoke
WOW that's clean.
Better talk to the 2 stroke guys about the pump, if you have a Tilloston or Walbro (probably) you can modify the carb if it has a pump internally and return line to use a Mikuni pulse pump.
cool thanks guys
I would like if someone can explain whats ment by adding a t fitting to return fuel to tank
I have been having problems with fuel starvation going uphill and backfiring going downhill on my 2003 Bigfoot. Would this be a suitable thing to try? I have always felt that the vacuum fuel pumps are not really up to the job,Quote:
Originally Posted by Toys4Me
He is talking about having a return line to the tank. The stock pump only delivers 1.5 psi, this low pressure makes it easy for the float needle to stop the flow of fuel into the carb bowl. The aftermarket electric fuel pumps put out up to 3-5psi, this slightly higher pressue "may" be enough to overcome the needle pressure allowing excess fuel into the carb and flooding your motor. This can actually be a very serious problem if youe sitting parked with the ignition on, after the carb bowl fills up the excess fuel will start to spill down the carb throat into your motor. This can lead to a hydro lock when you try to start the motor again or the fuel will simply wash past the rings and into your crank case. If you run the motor with a crank case full of fuel you won't be happy.Quote:
Originally Posted by jss16
The solution to this potential problem is to install a return fuel line with a 1.5 PSI check valve using a T fitting. Once the upstream fuel line pressue reaches 1.5 PSI, the excess fuel is bled off through the check valve and back to the fuel tank through a return line.
Sounds like your a perfect candidate for it from your description. Backfiring is also a sign of a lean mixture (lack of fuel).Quote:
Originally Posted by geoargo
ThanksQuote:
Originally Posted by Canadian_Zuk
So it sounds like I also need to install a T fitting with check valve and return line as you describe above if I am going to use this unit becasue of the higher pressure this puts out. Wouldn't that require a long fuel line all the way back to the fuel tank plus some modification to the fuel tank to get the retun line into it?
Quote:
Originally Posted by geoargo
A return line from the engine compartment would be most ideal but you can just run the T fitting from near the fuel pump at the rear of the machine into the tank, as long as you splice into the fuel line upstream of the electric pump a few inches you'll be fine.
Has you machine always acted this way or is this a recent problem? I would start by changing out the rubber fuel lines and either replace or service the diaphram vacuum pump if this is something that started recently. Fuel lines deteriorate over time, if they are old and original they may be part of your problem. I also like to add a see through fuel filter just before the carb on everything I own, you would be surprised at the amount of rubber particles I see sometimes.